I think I asked a question here when I received the mail. I found the reason. Because this is the web end of the call WeChat, can only be opened with WeChat, in addition to the Jingdong. Because Jingdong WeChat login interface is not the same.

“https://open.weixin.qq.com/sn…”This is the interface of the Jingdong tune. API is not found in it. Students who have seen can open the page of Jingdong mobile phone with chrome.https://m.jd.com/Absolutely unimaginable py transactions